logging - SLF4J:类路径包含多个 SLF4J 绑定(bind)。控制台上打印的消息

Question

我想在控制台上打印日志并将它们写入文件。在我使用 akka 记录器的 scala 项目中，这里是我的 build.sbt

libraryDependencies ++= Seq("org.mongodb" %% "casbah" % "2.8.0",
                            "org.slf4j" % "slf4j-simple" % "1.7.12",
                            "org.elasticsearch" % "elasticsearch" % "1.5.0",
                            "org.scalatest" %% "scalatest" % "2.2.1" % "test"
                        withSources() withJavadoc(),
                        "org.easymock" % "easymock" % "3.1" withSources() withJavadoc(),
                        "org.mockito" % "mockito-all" % "1.9.5",
                        "com.typesafe.akka" %% "akka-actor" % "2.3.6",
                        "ch.qos.logback" % "logback-classic" % "1.0.9",
                        "com.typesafe.akka" %% "akka-slf4j" % "2.3.9")

这是我的代码的一部分

import akka.event.Logging

val log = Logging(context.system, this)
case RegularAdminWriteInMongo =>
    log.debug("writing to mongo")
    log.info("message received RegularAdminWriteInMongo")

当我在 sbt 中运行我的程序时，会打印以下消息

SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar: file: /home/sara / .ivy2 / cache / org.slf4j / slf4j - simple / jars / slf4j - simple - 1.7.12.jar!/org/slf4j / impl / StaticLoggerBinder.class] SLF4J: Found binding in [jar: file: /home/sara / .ivy2 / cache / ch.qos.logback / logback - classic / jars / logback - classic - 1.0.9.jar!/org/slf4j / impl / StaticLoggerBinder.class] SLF4J: See http: //www.slf4j.org/codes.html#multiple_bindings for an explanation. SLF4J: Actual binding is of type[org.slf4j.impl.SimpleLoggerFactory] [ArteciateActorSystem - akka.actor. default -dispatcher - 3] INFO akka.event.slf4j.Slf4jLogger - Slf4jLogger started[ArteciateActorSystem - akka.actor. default -dispatcher - 2] INFO models.AdminUserModels.AdminUserModelsActors.RegularAdminWriteMongoActor - message received RegularAdminWriteInMongo

之后我的其他 println 语句被打印出来，请帮助我如何停止显示此消息，也请不要将我的问题标记为重复，因为在我查看它之前提出的问题，但它不能解决我的问题..请帮助谢谢

Answer 1

错误消息已经告诉您您需要知道的一切。消息中提供的链接 (http://www.slf4j.org/codes.html#multiple_binding) 说:

SLF4J API is designed to bind with one and only one underlying logging framework at a time. If more than one binding is present on the class path, SLF4J will emit a warning, listing the location of those bindings.

您的类路径包括 SLF4J 的两个绑定(bind):

/home/sara/.ivy2/cache/org.slf4j/slf4j-simple/jars/slf4j-simple-1.7.12.jar

和

/home/sara/.ivy2/cache/ch.qos.logback/logback-classic/jars/logback-classic-1.0.9.jar

确保您的类路径上只有一个绑定(bind)，并且不会再次显示警告。

总结一下: 从依赖项中删除 slf4j-simple，logback-classic 就足够了。